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JOSEPH A. JONES, OF BALTIMORE, MARYLAND, ASSIGNOR TO HIMSELF AND JOHN DONALDSON, OF SAME PLACE.

Letters Patent .ZlTo. 82,529, dated September 29, 1868.

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TO ALL WHOM IT MAY CONOERN:

Be it known that I, JOSEPH A. J ONES, of Baltimore, in the county of Baltimore, and in the State of Maryland, have invented certain new and useful Improvements in Roofing-Compound; and do hereby declare that.

the following is a full, clear, and exact description thereof.

My invention consists of the following ingredients: Coal-tar, two and ahalf gallons; parafiine varnish, one I and a half gallon; pulverized iron ore, sixty pounds; ground slate, fifty pounds; which are mixed together and spread on the roof of a building. It soon hardens, and becomes impervious to rain, snow, &c., and will last longer than any other roofing-compound nowin use. I

I do not, however, confine myself to the exact proportions or ingredients above mentioned,.but may vary them'to suit different climates and circumstances Having thus fully described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

A compound, consisting of the ingredients mentioned, and applied to roofs, substantially as and for the purposes herein set forth.

' In testimony that I claim the foregoing, I have hereunto set my hand, this 23d day of June, 1868.

'i J, A. JONES.

Witnesses:

A. N MARE, Lnoronn Evnnr. 

